bendns' repos / aoc
heh
Diffstat (limited to 'src/main.rs')
-rw-r--r--src/main.rs29
1 files changed, 7 insertions, 22 deletions
diff --git a/src/main.rs b/src/main.rs
index aa6a487..49f6081 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -71,30 +71,15 @@ use crate::util::{MapF, UnionFind};
#[unsafe(no_mangle)]
#[implicit_fn::implicit_fn]
pub unsafe fn p1(x: &'static [u8; ISIZE]) -> impl Debug {
- let value = x.chunked::<202>();
- let mut dir = Dir::S;
- let mut start = value.find(b'|');
- let mut letters = vec![];
- let mut steps = 0;
- loop {
- steps += 1;
- match value[start.1][start.0] {
- b'+' => {
- (dir, start) = [dir.turn_90(), dir.turn_90ccw()]
- .into_iter()
- .fmap_w(_ + start)
- .find(|&(_, (x, y))| !value[y][x].is_ascii_whitespace())
- .unwrap();
- }
- b' ' => return (letters.str().to_owned(), steps),
- l => {
- if l.is_ascii_alphabetic() {
- letters.push(l)
- }
- start = (dir + start).unwrap()
- }
+ let mut set = HashSet::default();
+ let mut n = 0;
+ for freq in util::ints::<i32>(x).collect::<Vec<_>>().into_iter().cycle() {
+ n += freq;
+ if !set.insert(n) {
+ return n;
}
}
+ panic!()
}
const ISIZE: usize = include_bytes!("inp.txt").len();